https://atlantstom.ru/bitrix/templates/aspro-allcorp3medc/js/matchMedia.js

1/*! matchMedia() polyfill - Test a CSS media type/query in JS. Authors & copyright (c) 2012: Scott Jehl, Paul Irish, Nicholas Zakas, David Knight. Dual MIT/BSD license */
2
3window.matchMedia ||
4  (window.matchMedia = (function () {
5    "use strict";
6
7    // For browsers that support matchMedium api such as IE 9 and webkit
8    var styleMedia = window.styleMedia || window.media;
9
10    // For those that don't support matchMedium
11    if (!styleMedia) {
12      var style = document.createElement("style"),
13        script = document.getElementsByTagName("script")[0],
14        info = null;
15
16      style.type = "text/css";
17      style.id = "matchmediajs-test";
18
19      script.parentNode.insertBefore(style, script);
20
21      // 'style.currentStyle' is used by IE <= 8 and 'window.getComputedStyle' for all other browsers
22      info = ("getComputedStyle" in window && window.getComputedStyle(style, null)) || style.currentStyle;
23
24      styleMedia = {
25        matchMedium: function (media) {
26          var text = "@media " + media + "{ #matchmediajs-test { width: 1px; } }";
27
28          // 'style.styleSheet' is used by IE <= 8 and 'style.textContent' for all other browsers
29          if (style.styleSheet) {
30            style.styleSheet.cssText = text;
31          } else {
32            style.textContent = text;
33          }
34
35          // Test if media query is true or false
36          return info.width === "1px";
37        },
38      };
39    }
40
41    return function (media) {
42      return {
43        matches: styleMedia.matchMedium(media || "all"),
44        media: media || "all",
45      };
46    };
47  })());